Prime Minister David Cameron is expected to return to the Royal Welsh Show at Llanelwedd this week, to offer a personal “thank you” to voters in Wales who helped put him back in Number 10.

Mr Cameron was the first serving British Prime Minister to attend Wales’ showcase agricultural event when he flew into the showground by helicopter on the opening day of the four-day show last year and urged Wales to “stick with him”.

Steve Hughson, chief executive of the Royal Welsh Agricultural Society (RWAS) said: ‘We are delighted that the Prime Minister, David Cameron, enjoyed his visit to the Royal Welsh Show so much in 2014 that he has expressed his intention to return again this year.

“This would be the second time a serving Prime Minister has visited the show and proof, if it were needed, that many high-profile visitors hold the Royal Welsh brand in high regard and see the show as the perfect platform to launch discussion, do business and build relationships.”

The Prince of Wales and Duchess of Cornwall smile as they visit the Royal Welsh Show at Royal Wales Showground at Llanelwedd, Builth Wells.

Last year, together with Environment Secretary Liz Truss, Mr Cameron announced a £400m scheme to boost public food procurement by central Government.

This year his visit will coincide with the RWAS commemorations of The Battle of Britain, which was the first major battle in history fought entirely in the air.

From today until Wednesday there will be a spectacular double aerial display from a Hawker Hurricane and Spitfire from the Battle of Britain Memorial Flight, commemorating the 75th anniversary of the Battle of Britain - Lest We Forget.

Mr Cameron is likely to hear Welsh farmers’ concerns about the supermarket chains that have been actively promoting foreign meat when there is a plentiful supply of Welsh Lamb after a successful spring.

Dai Davies, chairman of Hybu Cig Cymru – Meat Promotion Wales said: “I’m sorry to say that some multiple retailers have not shared our vision of cooperation within the industry and have been complicit in maintaining the supply of imported as opposed to home grown lamb.

The Royal Welsh Show main ring (Image: Peter Bolter)

“I urge them to reconsider their sourcing policies and decide whether they really want to sacrifice the long-term future of the UK’s supply chain for a short-term gain.”

Farmers and other leading figures in the UK meat industry have been angered by the amount of New Zealand lamb that is still being promoted by certain supermarkets at the expense of Welsh Lamb.

Mr Davies will today tell leading figures at the showgorund that lamb prices have been in decline for most of the year and are “hitting worryingly low levels.”

The HCC chairman will deliver a speech at a reception breakfast, during which he will say: “Low enough, in fact, to make some sheep farmers wonder whether there is a realistic future for them.”

Farmers are receiving between £25 and £30 per head less for their sheep this year than during the same period last year.

The show will be opened today by European Commissioner for Agriculture and Rural Development, Phil Hogan.

He will hear Welsh farmers‘ concerns about their place in the volatile European market at a question and answer session.